Lifting-jack



J. A. BILL.

LIFTING JACK.

(No Model.)

N0. 363,050. Patented-May 1'7, 1887.

N PETERS. Phom-ulmaw en wmin wn. n. c,

UNiTED drains Parent @rrrcng JOSHUA ADAM BILL OF FREDERICK, MARYLAND.

LlFTING-JACK.

SPECIFICATION forming part of Letters Patent No. 363,050, dated May 17,18187. Application filed March 14, 1887. Serial No. 230,863. (No model.)

To all whom, it may concern.-

Be it known that I, JOSHUA ADAM DILL, a citizen of the United States,residing at Frederick, in the county of Frederick and State of Maryland,have invented a new and useful Improvement in Lifting-Jacks, of whichthe following is a specification.

My invention" relates to an improvement in liftingjacks forvehicles; andit consists in the peculiar construction and combination of devices,that will be more fully set forth hereinafter, and particularly pointedout in the claims.

In the drawings, Figure l is a perspective View of a lifting-jackembodying myimprovements. Fig. 2 is a side view of the samein anotherposition. Fig. 3 is a horizontal sectional view taken on the line at wof Fig. 2. Fig. 4 is a similar section on the line 3 y, Fig. 2.

.A represents a vertical standard, which is provided at its lowerendwith a supportingbase, B. To the upper end of the standard,oi1opposite sides thereof, are secured plates 0, which extend above theupper end of the standard and form ears, between which is pivoted anoperating-lever, D. On the front edge of the standard, at a suitabledistance from the lower end thereof, is aseries of ratohet-teeth,E.

F represents a vertically-movable bar,which is arranged on one side ofthe standard A, and 18 provided near its upper end with an arm, G,whichextends rearward] y across one side of the standard A,and has its rearend bent inward at right angles and caused to engage a Vertical slot, H,which is made in one side of the standard. A vertical slot, l, is madeon the front edge of one of the plates 0, to permit the arm G to extendbetween the same and the end of the lever D by means of links N. On thefront edge of the bar F, at a suitable distance from the lower endthereof, is a vertical series of ratchet-teeth, O.

1? represents a bracket, which has its rear end bifurcated to receivethe bar F, and from the'lower side of the said bracket depends a detent,R, which forms a pawl and is adapted to engage the ratchet-teeth O. I

S represents a pin,which connects the blfurcated rear end of the bracketand. extends across the rear side of the bar F, and works in a verticalgroove or recess, T, with which the said bar is provided.

A fiat spring,U,- is secured to the inner edge of the standard A, andextends outwardly to Ward the opposing inner edge of the bar F and bearsagainst the said bar, the function of the said spring being to normallymove the bar F a slight distance from the standard A, so as to preventthe ratchets K from engaging the ratchet teeth E.

The operation of myinvention is as follows: In order to raise one end ofthe axle of a vehicle to remove the wheel therefrom, the operatorinserts the front end of the bracket P under the said axle, havingpreviously raised the bracket to a suitable point 011 the bar F. He thenbears down on the free end of the lever D,which causes the bar F to riseand carry the bracket with it, and thus raise the axle of the vehicle.The weight of the vehicle causes the bar F to move toward the standard Aagainst the pressure of the spring U, so that when the bar F has beenraised a suit-able dis tance its ratchet-teeth K become engaged with theratchet-teeth E on the standard, and thus the bar F is locked inposition and holds the axle of the vehicle when elevated. In order tolower the axle, the operator places one foot on the outer end of thefoot-bar M, thereby causiug the lower end of the bar F to recede fromthe standard A and disengage its teeth from the teeth of the saidstandard,when the lever D is free to move upwardly and cause the bar Fand the bracket to descend.

By providing the vertically-moving bar F with the ratchet-teeth O, andthe verticallymovable bracket 1? having the detent to en- 2 i eeaosegage the said teeth, the said bracket may be adjusted to the necessaryheight on the bar F in a very short space of time.

Having thus described my invention, I claim-- 1. In a lifting-jack, thecombination of the standard having the teeth E, the lifting'bar movablevertical] yand adapted toswin g toward and from the standard, and havingthe teeth K to engage the teeth E, the spring U, to normally move thelifting-bar out of engagement with the standard, and the lever to raiseand lower the lifting-bar,substanti ally as described.

2. The combination, in a liftingjack, of the vertical standard A, havingthe ratchet-teeth E on one edge near its lower end, the lever D,fulcrumed to the upper end of the standard, the vertically-movable barF, connected to the lever and having the teeth K, to engage the teeth ofthe standard when the bar F is raised,

and the bracket P, secured to the bar F, substantially as described.

3. The combination, in a lifting-jack,of the standard A, having theteeth E near its lower end, the lever D, fulcr'umed to the upper end ofthe standard, the vertieally-movable liftingbar F, connected to thelever and provided at its lower end with theteeth K, adapted to engagethe teeth E, (when the bar F is raised,) the footbar M, projecting fromthe bar F, and the spring U, to normally move the lower end of the bar Ffrom the standard A, for the purpose set forth, substantially asdescribed.

In testimony that I claim the foregoing as my own Ihave hereto affiXedmy signature in presence of two witnesses.

JOSHUA ADAM DILL.

Witnesses:

G. M. D. CLABAUGH, RICHARD O. HAGAN.

